Improved Line Ratio Calculations Involving Delta N = 1 (2--3) Transitions in O V and a Reanalysis of SKYLAB Observations of Solar Flares
Abstract
R-matrix calculations of electron-impact-excitation rates in O V are used to rederive theoretical electron-density diagnostic emission-line ratios involving transitions between the n = 2 and 3 levels, which includes lines at 192.80, 192.90, 215.10, 215.25, 220.35, and 248.46 A. A comparison of these diagnostics with observational data for two solar flares obtained with the spectrograph on board Skylab reveals better agreement between theory and observation than was found previously. This provides experimental support for the improved accuracy of the atomic data employed in the present analysis.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 1991
- DOI:
- 10.1086/170723
- Bibcode:
- 1991ApJ...382..349K
- Keywords:
-
- Electron Transitions;
- Line Spectra;
- Oxygen Spectra;
- Solar Flares;
- Solar Spectra;
- Atomic Excitations;
- Electron Density (Concentration);
- Emission Spectra;
- Oxygen Ions;
- Skylab Program;
- Solar Physics;
- ATOMIC PROCESSES;
- SUN: FLARES;
- SUN: SPECTRA;
- ULTRAVIOLET: SPECTRA